Dental pliers



Patented Sept. l3, I898.

E. 'H. ANGLE. DENTAL PLIERS.

(Application flied Feb. 3, 1898.)

(No Model.)

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lJNiTno STATES PATENT Unmet.

EDWARD I-I. ANGLE, OF ST. LOUIS, MISSOURI.

DENTAL PLIERS.

SPECIFICATION forming part of Letters Patent No. 610,840, datedSeptember 13, 1898.

Application filed February 3,1898. Serial No. 668,960. (No model.) I

To all whom it may concern.-

Be it known that I, EDWARD H. ANGLE, a citizen of the United States,residing at St. Louis, in the State of Missouri, have invented certainnew and useful Improvements in Dental Pliers; and 1 do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My present invention has for its object to provide a pair of pliers ofimproved construction which are better adapted for general use and areparticularly adapted for and meet the peculiar requirements of anefficient device for applying teeth-bands.

Very light metal bands are secured around the teeth, in some instancesto afford an anchorage and in other instances to secure theteeth-regulating device to a tooth which is to be moved. In such casesthe bands must be very tightly and accurately fitted to the outlines ofthe teeth to which they are applied. \Vith pliers as hithertoconstructed great difficulty has been found in properly clamping andfitting the band to the tooth. This is due to the fact that a great manydifferent angles are presented for the operating edge of the pliers towork upon in order to pinch the band around the tooth so as to make thesame take the perfect form of the surface of the tooth. IVith a singlepair of pincers as hitherto construct-ed it has been found impossible toeffect this result.

I accomplish the desired result above noted by constructing the ends ofthe biting-jaws with a plurality of operating edges adapted fordifferent applications to the teeth, as hereinafter more specificallynoted.

The preferred form of my improved pinching-pliers is illustrated in theaccompanying drawin gs, wherein, like characters indicating like partsthroughout the several views- Figure 1 is a perspective view of my saidimproved pliers. Fig. 2 is a perspective view showing an upper human jawpartly broken away and illustrating different ways of using the pliersin applying bands to the teeth thereof, and Fig; 3 is a perspective viewshowing a lower human jaw and illustrating different ways of using thepliers in applying bands to the teeth thereof.

a indicates an upper and b a lower human aw.

0 indicates the band material.

1 indicates the plier-levers, which are pivoted at 2 and have their jaws3 curved or bent laterally in a plane that cuts the axis of the pivot 2.At their biting ends the jaws 3 are provided with threeoperating-surfaces 4, 5, and 6. The operating edges 5 and 6 extendapproximately parallel to each other and the operating edge 4 is outobliquely, so that it forms an acute angle with the edge 6 and an obtuseangle with the edge 5. The operating edges 5 and 6 project laterallyfrom the jaws 3. At their intermediate portions the jaws 3 are providedwith cooperating semicylindrical transverse grooves 7 and also with oooperating angular grooves 8.

' In Fig. 2 the full-line view of the pliers illustrates how the obliqueor beveled operating edges t are adapted for use when a band is beingapplied to one of the upper teeth from the labial surface of the jaw,and

the pincers indicated by dotted lines in said Fig. 2 illustrate how theinner operating edges 5 become serviceable to clamp a band to one of theupperteeth from the lingual surface of the upper jaw.

In Fig. 3 the pliers indicated by full lines illustrate how the inneroperating edges 5 become serviceable in clamping a band to one of thelower teeth from the lingual surface of the jaw,'and the pliersindicated by dotted lines in said Fig. 3 illustrate how the outeroperating edges 6 are adapted for use in clamp ing a band to one of thelower teeth from the labial surface of the lower jaw.

By reference particularly to Fig. 1 it will be noted that the jaws 3 arecurved or bent in the plane of the biting-surfaces of said jaws and thatthe biting edges 4, 5, and 6 extend in the same plane. It will also benoted that the biting edges 4.- and 5 form an obtuse angle, the vertexof which is located on the concave side of the jaw,'while, on the otherhand, said biting edges 1 and 6 form an acute angle, the vertex of whichis located on the convex side of the said jaw.

From the foregoing illustrations and statements made it must be obviousthat a pair of pliers constructed as above described is adapted foraccess to the labial and lingual surfaces of both the upper and lowerincisors or to the molars which lie farther back in the mouth. In otherwords,the pliers are adapted for universal use in applying or fittingbands to the teeth. The cooperating semicylindrical grooves 7 areserviceable for grasping round wire, and the cooperating angular grooves8 are serviceable for holding square nuts or square wires. Thesegrooves, it will be noted,extend approximately on lines which representradii of the curve on which the jaws of the pliers are bent. This isimportant, as it permits the grooves to be used with the work extendingtangentially to said grooves and gives an increased clearness for thehand of the operator.

What I claim, and desire to secure by Lettors Patent of the UnitedStates, is as follows:

1. A pair of pliers, having its jaws 3 bent in the plane of thebiting-surfaces thereof, and provided with the terminal biting edges 4and 6 that form acute angles to each other,

located with their vertices projecting on the convex sides of said jaws,substantially as described.

2. A pair of pliers having its jaws 3 bent in the plane of thebiting-surfaces thereof, and provided With the terminal biting edges 4and 5 that form obtuse angles, located with their vertices projecting onthe concave sides of said jaws, substantially as described.

3. The pair of pliers having the jaws 3, provided with the terminalbiting edges 4, 5 and 6, said edges 4: and 5 forming obtuse angles andsaid edges 4: and 6 forming acute angles, substantially as and for thepurposes set forth.

4. A pair of pliers having laterally curved or bent jaws provided attheir intermediate portions with cooperating grooves that extendapproximately on a radius of the curve on which said jaws are bent,substantially as and for the purposes set forth.

In testimony whereof I affix my signature in'presence of two Witnesses.

EDWARD H. ANGLE.

Witnesses:

ANNA HOPKINS, T. F. FLETCHER.

